Chapter 8 Cellular Respiration

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Which of these processes occurs in the cytosol?
a. the citric acid cycle
b. glycolysis
c. the electron transport system
d. the preparatory reaction

b. glycolysis

The preparatory reaction breaks
a. glucose into pyruvates
b. pyruvates into glucose
c. pyruvates into acetyl-CoA and carbon dioxide.
d. pyruvates into acetyl-CoA and water
e. acetyl CoA into pyruvates and carbon dioxide

c. pyruvates into acetyl-CoA and carbon dioxide.

Which process produces both NADH and FADH2?
a. the citric acid cycle
b. glycosis
c. the electron transport system
d. fermentation
e. the preparatory reaction

a. the citric acid cycle

Which process reduces molecular oxygen to water?
a. the citric acid cycle
b. glycolysis
c. the electron transport system
d. fermentation
e. the preparatory reaction

c. the electron transport system

The majority of the carbon dioxide we exhale is produced in
a. glycolysis
b. the electron transport system
c. lactate fermentation
d. the citric acid cycle

d. the citric acid cycle

The correct sequence for aerobic metabolic breakdown of glucose is
a. glycolysis-preparatory reaction-citric acid cycle-electron transport system
b. preparatory reaction-glycolysis-electron transport-citric acid cycle
c. electron transport system-citric acid cycle-preparatory reaction-glycolysis
d. none of these are correct

a. glycolysis-preparatory reaction-citric acid cycle-electron transport system

During the preparatory reaction of aerobic respiration what happens to the carbon molecules?
a. the carbon molecules are broken down from a 3-carbon to a 2-carbon acetyl group and a 1-carbon CO2 is released
b. the carbon molecules are broken down from a 4-carbon to a 3-carbon acetyl group and a 2-carbon is released.
c. the carbon molecules are converted from
d. the carbon molecules are broken down from a 3-carbon to 1-carbon

a. the carbon molecules are broken down from a 3-carbon to a 2-carbon acetyl group and a 1-carbon CO2 is released

Which statement is correct about the input and output of carbon during glycolysis?
a. there is an input of 6 carbons (glucose) and output of 6 carbons(2 pyruvates)
b. there is an input of 6 carbons (2 pyruvates) and output of 6 carbons (1 glucose)
c. there is an input of 6 carbons (glucose) and an output of 6 carbons (6CO2)
d. there is an input of 3 carbons (glucose) and an output of 3 carbons (pyruvate)

a. there is an input of 6 carbons (glucose) and output of 6 carbons(2 pyruvates)

If 7.3 Kcal are required to produced ATP from ADP+P, and the complete breakdown of glucose CO2 and h20 represents a possible energy 686 kcal per molecule, how efficient is glycolysis?
a. 0.21%
b.0.213%
c.2.13%
d.21%

c.2.13%

During glycolysis, glucose is
a. produced from two molecules of pyruvic acid
b. converted into two molecules of ATP
c. partially broken down and some of its stored energy is released
d. partially broken down and some of its stored energy is increased

c. partially broken down and some of its stored energy is released

When cells break down food molecules, energy
a. is released all at once
b. is released entirely as body heat into the environment
c. is temporarily stored in ATP molecules
d. causes excitation of electrons in chlrophyll molecules

c. is temporarily stored in ATP molecules

When glycolysis occurs
a. a molecule of glucose is split
b. two molecules of pyruvate are made
c. some ATP is produced
d. all of the above

d. all of the above

When muscles are exercised extensively in the absence of sufficient oxygen
a. a large amount of ATP is formed
b. NADH molecules split
c. lactic acid is produced
d. oxidative respiration ceases

c. lactic acid is produced

Acetyl-coenxyme A
a. is formed from the breakdown of pyruvate
b. enters the Krebs cycle
c. can be used in fat synthesis
d. all of the above

d. all of the above

glycolysis and oxidative respiration are different in that
a. glycolysis occurs on the cell membrane, while oxidative respiration occurs in mitochondria
b. glycolysis occurs in photosynthesis, while oxidative respiration is part of cellular respiration
c. glycolysis occurs in the absence of oxygen, while oxidative respiration requires oxygen
d. both of these terms are different names for the same processes

c. glycolysis occurs in the absence of oxygen, while oxidative respiration requires oxygen

With oxygen present, the krebs cycle and the electron transport chain
a. provide organisms an alternative to glycolysis
b. produce most of the ATP needed for life
c. break down glucose to produce carbon dioxide, water, and ATP
d. all the above

b. produce most of the ATP needed for life

The krebs cycle (citric acid cycle)
a. breaks down a two-carbon molecule into two molecules of co2
b. produces a 6-carbon molecule of co2
c. produces NAD+ and H+
d. generates most of the ATP produced in aerobic exercise

a. breaks down a two-carbon molecule into two molecules of co2

The krebs cycle : CO2 ::
a. glycolysis : glucos
b. acetyl-coA formation : O2
c. cellular respiration : O2
d. electron transport : ATP

d. electron transport : ATP

After proton pumps in mitochondria have depleted electrons of their energy during ATP production,
a. the electrons carried as part of hydrogen atoms are used in the formation of water
b. the electrons carried as part of hydrogen atoms are used in the formation of ethyl alcohol
c. the electrons build up inside the mitochondria and diffuse back to a thylakoid
d. none of the above

a. the electrons carried as part of hydrogen atoms are used in the formation of water

C6 H12 O2+ADP+P ->6CO2+6H20+MOLECULE A
The process shown in the equation above begins in the cytoplasm of a cell and ends in the
a. cytoplasm
b. mitochondria
c. endoplasmic reticulum
d. lyosome

b. mitochondria

The molecule referred to as Molecule "A" in the equation above is
a. NADPH
b. ATP
c. ADH
d. ADP

b. ATP

Which of the following is the best explanation for the presence of both chloroplasts and mitochondria in plant cells?
a, in the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs.
b. if plants cannot produce enough ATP in the process of photosynthese to meet their energy needs, they can produce it in aerobic respiration
c. sugars are produced in chloroplasts. these sugars can be stored in the plant for later use, converted to other chemicals, or broken down in aerobic respiration to yield ATP for the plant to use to meet its energy needs
d. the leaves and sometimes the stems of plants contain chloroplasts which produce APT to meet the energy needs of these plant parts. The roots of plants contain mitochondria which produce ATP to meet the energy of these plant parts.

c. sugars are produced in chloroplasts. these sugars can be stored in the plant for later use, converted to other chemicals, or broken down in aerobic respiration to yield ATP for the plant to use to meet its energy needs

C6H12O6 (glucose) + 6CO2 --> 6CO2 + 6H2O + energy
'---------------a------------------'-------------b----------'

a____________
b____________

a) oxidation
b) reduction

____ is a biochemical pathway of cellular respiration that is anaerobic

glycolysis

During fermentation, either ethyl alcohol and carbon dioxide or ______is formed.

lactic acid

Cellular respiration

is a metabolic pathway that breaks down nutrients into smaller molecules

krebs/citric acid cycle

the metabolic sequence of enzyme-driven reactions by which carbohydrates, proteins, and fatty acids produce carbon dioxide, water, and ATP.

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